Table A1.

Definitions of chronic conditions.

Chronic condition	Diagnoses (ICD-9-CM)*	Encounters (CPT)*	Exclusions
High blood pressure	360.42, 362.11, 401, 401.0, 401.1, 401.9, 402, 402.0, 402.00, 402.01, 402.1, 402.10, 402.11, 402.9, 402.90, 402.91, 403, 403.0, 403.00, 403.1, 403.10, 403.9, 403.90, 404, 404.0, 404.00, 404.01, 404.1, 404.10, 404.11, 404.90, 404.9, 404.91, 405, 405.0, 405.01, 405.09, 405.1, 405.11, 405.19, 405.9, 405.91, 405.99, 437.2	Outpatient visit for the following: 99201-05, 99211-15, 99241-45, 99341-50, 99381-87, 99391-97, 99401-04, 99411-12, 99420, 99429, 99455-56	No documentation of renal transplant
Depression	296.2, 296.20, 296.21, 296.22, 296.23, 296.24, 296.25, 296.26, 296.3, 296.30, 296.31, 296.32, 296.33, 296.34, 296.35, 296.36, 296.82, 296.90, 298, 298.0, 300.4, 309.1, 309.28, 311	Hospital admission, emergency department visit, or outpatient visit for the following: 99201-05, 99211-15, 99241-45, 99341-50, 99381-87, 99391-97, 99401-04, 99411-12, 99420, 99429, 99455-56	None
Diabetes mellitus	250.x	Hospital admission, emergency department visit, or two outpatient visits for the following: 99201-05, 99211-15, 99241-45, 99341-50, 99381-87, 99391-97, 99401-04, 99411-12, 99420, 99429, 99455-56 Dispensed insulin or hypoglycemic/anti-hyperglycemics on an ambulatory basis	None

ICD-9-CM: International Classification of Diseases, Ninth Revision, Clinical Modification; CPT: current procedural terminology.

^*To be identified with a chronic condition. Specifications require at least one CPT and ICD-9-CM code to be paired on the same day.